219  
FNUS74 KHUN 091211  
FWSHUN  
 
SPOT FORECAST FOR ROCKHOSE TRIANGLE...USFS  
NATIONAL WEATHER SERVICE HUNTSVILLE AL  
711 AM CDT FRI JUN 9 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 CDT ON JUNE 09.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
DRY CONDITIONS WILL PREVAIL AT THE BURN SITE THROUGH THE WEEKEND  
AS HIGH PRESSURE BUILDS ACROSS THE AREA. RH VALUES WILL BOTTOM OUT  
AROUND 40 PERCENT THIS AFTERNOON. WINDS WILL GENERALLY REMAIN  
LIGHT AND VARIABLE THROUGH THE DAY, THOUGH TRANSPORT WINDS WILL  
MAINTAIN A SOUTHWESTERLY COMPONENT AROUND 5 MPH. MIXING HEIGHTS  
WILL RISE TO AROUND 2000 FEET BY 9 AM AND THEN MAX AROUND 5000  
FEET LATER THIS AFTERNOON. ALTHOUGH MIXING HEIGHTS WILL BE  
RELATIVELY HIGH, THE LIGHT TRANSPORT WINDS WILL RESULT IN FAIR  
DISPERSION CONDITIONS TODAY. SIMILAR CONDITIONS ARE EXPECTED ON  
SATURDAY, WITH THE EXCEPTION BEING HIGH TRANSPORT WINDS FROM THE  
SOUTH, AROUND 10 MPH. GIVEN THE INCREASE IN TRANSPORT WINDS, AND  
THE HIGH MIXING HEIGHTS, DISPERSION CONDITIONS WILL BE GOOD.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
MAX TEMPERATURE.....AROUND 81.  
MIN HUMIDITY........45 PERCENT.  
WIND (20 FT)........LIGHT WINDS.  
MIXING HEIGHT.......2200-3800 FT AGL, INCREASING TO 5000-5500 FT  
AGL IN THE LATE MORNING AND AFTERNOON.  
TRANSPORT WINDS.....EAST AROUND 3 MPH, BECOMING SOUTHWEST 3 TO 5  
MPH IN THE LATE MORNING AND AFTERNOON.  
LVORI...............4.  
 
TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............61 67 72 75 77 78 79 81 81 81  
RH..............87 75 64 58 52 50 49 46 46 47  
20 FT WIND DIR..010 340 140 170 230 260 260 270 270 270  
20 FT WIND SPD..1 1 2 2 3 3 3 3 3 3  
20 FT WIND GUST. 5 5 5 5 5 5 5 5  
MIX HGT (KFT)...2.2 3.8 5.0 5.5 5.5 5.4 5.5 5.5 5.5 5.5  
TRANSP WIND DIR.090 180 230 230 230 240 230 220 220 210  
TRANSP WIND SPD.3 5 5 5 3 3 3 3 3 3  
DISPERSION IDX..2 2 2 29 22 21 21 22 22 21  
LVORI...........5 5 2 2 2 2 2 2 2 2  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).  
MIN TEMPERATURE.....AROUND 61.  
MAX HUMIDITY........93 PERCENT.  
WIND (20 FT)........LIGHT WINDS.  
MIXING HEIGHT.......4900-5400 FT AGL, DECREASING TO 0-300 FT AGL.  
TRANSPORT WINDS.....EAST 1 TO 6 MPH.  
LVORI...............5.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........MCR MCR MCR MCR MCR CLR CLR CLR CLR MCR MCR MCR  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............80 77 73 69 65 63 62 62 62 61 61 61  
RH..............51 58 66 76 84 90 90 90 87 90 90 93  
20 FT WIND DIR..270 270 300 350 010 030 080 100 100 110 110 110  
20 FT WIND SPD..2 2 2 2 2 2 2 2 2 2 2 2  
20 FT WIND GUST.5 5 5 5 5 5 5 5 5 5 5 5  
MIX HGT (KFT)...5.4 5.2 5.4 5.3 4.9 3.4 1.7 0.3 0.1 0.1 0.2 0.1  
TRANSP WIND DIR.200 200 190 180 180 170 160 160 140 100 080 080  
TRANSP WIND SPD.3 3 5 6 6 5 3 2 1 1 1 1  
DISPERSION IDX..21 21 28 35 32 19 2 1 1 1 1 1  
LVORI...........2 3 3 3 4 4 4 7 7 7 7 7  
   
SATURDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
MAX TEMPERATURE.....AROUND 87.  
MIN HUMIDITY........42 PERCENT.  
WIND (20 FT)........LIGHT WINDS, BECOMING SOUTH AROUND 5 MPH IN THE  
AFTERNOON.  
MIXING HEIGHT.......0-200 FT AGL, INCREASING TO 6700-7200 FT AGL.  
TRANSPORT WINDS.....SOUTH 0 TO 9 MPH, INCREASING TO 10 TO 12 MPH IN  
THE AFTERNOON.  
LVORI...............4.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............62 64 68 73 78 82 84 86 87 87 87 86  
RH..............90 90 81 71 60 51 48 43 42 43 43 45  
20 FT WIND DIR..120 120 130 150 160 170 180 180 180 180 180 180  
20 FT WIND SPD..2 2 2 3 3 3 3 5 5 5 5 5  
20 FT WIND GUST.5 5 5 5 5 5 5 10 10 10 10 10  
MIX HGT (KFT)...0.1 0.2 2.0 4.2 6.1 6.7 6.8 6.7 6.9 7.1 7.1 7.2  
TRANSP WIND DIR.070 070 100 160 190 190 180 180 180 180 180 180  
TRANSP WIND SPD.0 1 3 6 8 9 10 10 10 10 10 12  
DISPERSION IDX..0 1 2 3 4 67 76 75 77 78 78 88  
LVORI...........7 5 5 5 1 1 1 1 1 1 1 1  
 

 
FORECASTER...CHACE  
REQUESTED BY...KERRY  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1710865.0/HUN  
.EMAIL KERRYCLARK@FS.FED.US  
 
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